Preview Tool

Cisco Bug: CSCtd69256 - ATM SPA errors after VPI reuse in scaled onfiguration

Last Modified

Mar 10, 2018

Products (1)

  • Cisco Carrier Routing System

Known Affected Releases


Description (partial)

    spa related errors
  Generally accompanied by channel stats error.
1. Configure a scaled setup with 4k ATM xconnect sessions under a L2 VP mode.
2. Delete the L2 VPs thus bringing the xconnects down.
3. Configure VC mode L2 transport and bring the xconnect sessions backup.

Under such a sequence of actions, there is a possibility that one of the VP
teardown does not go through clean leaving behind stale Channel of the VP. If a
subsequent VC is created with same VPI value, it might sometimes result in
traffic outage on that particular L2-VC.
  When the problem occurs, the show hw-module subslot <> counter sar will
  indicate a CID for VCD mapped to the L2 VP which was deleted indicating it is
Bug details contain sensitive information and therefore require a account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.